<template>
  <div class="tree-view-item">
    <div class="level" :class="'level-'+ menu.level" v-for="menu in menus" :key="menu.id">
      <div v-if="menu.type === 'link'">
        <router-link class="link" v-bind:to="menu.url" @click.native="toggle(menu)">{{menu.name}}</router-link>
      </div>
      <div v-if="menu.type === 'button'">
        <div class="button heading" :class="{selected: menu.isSelected,expand:menu.isExpanded}" @click="toggle(menu)">
          {{menu.name}}
          <div class="icon">
            <svg xmlns="http://www.w3.org/2000/svg" focusable="false" viewBox="0 0 24 24">
              <path d="M8.59 16.34l4.58-4.59-4.58-4.59L10 5.75l6 6-6 6z "></path>
            </svg>
          </div>
        </div>
         <transition name="fade">
          <div class="heading-children" v-show="menu.isExpanded" v-if="menu.subMenu">
            <Tree-view-item :menus='menu.subMenu'></Tree-view-item>
          </div>
        </transition>
      </div>
    </div>
  </div>
</template>
<script>
export default {
  name: "TreeViewItem",
  props: ["menus"],
  created() {
    this.$store.commit("firstInit", { url: this.$route.path });
  },
  methods: {
    toggle(menu) {
      this.$store.commit("findParents", { menu });
    }
  }
};
</script>
<style scoped>
a {
  text-decoration: none;
  color: #333;
}
.link,
.button {
  display: block;
  padding: 10px 15px;
  transition: background-color 0.2s ease-in-out 0s, color 0.3s ease-in-out 0.1s;
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  -khtml-user-select: none;
  user-select: none;
}
.button {
  position: relative;
}
.link:hover,
.button:hover {
  color: #1976d2;
  background-color: #eee;
  cursor: pointer;
}
.icon {
  position: absolute;
  right: 0;
  display: inline-block;
  height: 24px;
  width: 24px;
  fill: currentColor;
  transition: -webkit-transform 0.15s;
  transition: transform 0.15s;
  transition: transform 0.15s, -webkit-transform 0.15s;
  transition-timing-function: ease-in-out;
}
.heading-children {
  padding-left: 14px;
  overflow: hidden;
}
.expand {
  display: block;
}
.collapsed {
  display: none;
}
.expand .icon {
  -webkit-transform: rotate(90deg);
  transform: rotate(90deg);
}
.selected {
  color: #1976d2;
}
.fade-enter-active {
  transition: all 0.5s ease 0s;
}
.fade-enter {
  opacity: 0;
}
.fade-enter-to {
  opacity: 1;
}
.fade-leave-to {
  height: 0;
}
</style>
